90546557 has 2 divisors, whose sum is σ = 90546558. Its totient is φ = 90546556.

The previous prime is 90546541. The next prime is 90546559. The reversal of 90546557 is 75564509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82101721 + 8444836 = 9061^2 + 2906^2 .

It is an emirp because it is prime and its reverse (75564509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90546557 - 2⁴ = 90546541 is a prime.

Together with 90546559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90546559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45273278 + 45273279.

It is an arithmetic number, because the mean of its divisors is an integer number (45273279).

Almost surely, 2^90546557 is an apocalyptic number.

It is an amenable number.

90546557 is a deficient number, since it is larger than the sum of its proper divisors (1).

90546557 is an equidigital number, since it uses as much as digits as its factorization.

90546557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 90546557 is about 9515.5954621873. The cubic root of 90546557 is about 449.0458085911.

The spelling of 90546557 in words is "ninety million, five hundred forty-six thousand, five hundred fifty-seven".